Pencil-sharpener



(NoModelJ W. H. LAMSON'.

PENCIL SHARPENER.

X e a Fig. f

L n E S S E S 'u/MLQX @UIEEYQSOJQ NITE TATES VARREN H. LAMSON, OF LYNN,MASSACHUSETTS.

PENCIL-SHARPENER.

SPECIFICATION forming part of Letters Patent No. 334,242, dated January12, 1886.

Application filed January 12, 1885. Serial No. 152,646.

To aZZ whom, it may concern:

Be it known that I, l/VARREN H. LAMSON, of Lynn, in the county of Essexand Commonwealth of Massachusetts, have invented certain Improvements inPencil-Sharpeners, of which the following, taken in connection with theaccompanying drawings, is a specification.

This invention relates to pencil-Sharpeners, and the nature thereof isfully described hereinafter, and specifically pointed out in the claims.

Referring to the drawings, Figure 1 is a perspective view of thepeneilsharpener and its handle, the two being represented as detached,but the manner of combining the two is indicated in this view by dottedlines. Fig. 2 is a vertical cross-section of the sharpener, made ondotted line :0 at. Fig. 3 is a vertical longitudinal section of thesharpener, and illustrates the operation of sharpening the pencil. Fig.4 is a sectional view of the sharpenerand illustrates the operation ofdischarging a broken lead therefrom.

The exterior formation of the pencil-sharpener A is fully illustrated inFig. 1 of the drawings. Said sharpener-case Ais composed of metal orother suitable material, and is provided with an end bore or chamber,made conical in form, or similar to the shape intended to be given tothe pointed pencil. Said case is further provided with a knife, a,whichis fixed in the chamber of the casein the usual way, and which operatesto trim the pencil while the case is being revolved. The chip removed bythe knife escapes outward through a suitable slot or throat in the caseA, as fully illustrated in Fig. 3. At the rear end of said chamber is astop, 6, which is represented as made integral with the case A; but itmay, if desired, be a distinct piece of metal fixed into the case A atthis point. In the operation of pointing a pencil the pencil is pushedinto the chamber in the case A until the end of the sharpened lead comesagainst this stop e, as in Fig. 3.

I am aware that a stop to arrest the inward progress of a pencil is notbroadly new in a pencilsharpener; but the stop ein my sharpener isformed so as to leave a partof the end face of the pencil-lead exposed,in order that it may be reached by the end of a pointer, H, and pushedbackward, as illustrated in Fig. 4.

(N0 model.)

To this end the stop 6 may be formed with one fiat side, or it may haveavery small central hole, through which the pointer may be introduced tothe end of the lead. The case A in rear of the stop 6 is solid andconical or tapering in form, thus forming a suitable tang to fit acorresponding bore in the handle 0. The case A is also provided with asmall hole, h, extending from the inner end of the pencil-chamberoutward to the rear side of the case. This opening h allows the leadfilings taken off the pencil to escape outward, and thus thesharpener iskept from clogging.

In close proximity to the hole h is an inclined hole, f, the inner endof which leads to that point on the end of the pencil-lead notcovered bythe stop 6, so that a pointer pressed into this hole will be guideddirectly to the end of the pencil-lead, and thus facilitate theoperation of dislodginga broken lead from the chamber.

I am aware that the pointer maybe operated down through the hole h, butnot so easily as through the holef.

For convenience and neatness in operation, the sharpener may beconnected with a handle, 0, or it may be inserted into the end of arevolving shaft and operated by asuitable crank.

In most cases the friction between the walls of the shaft and the tangof the sharpener will be sufficient to hold the sharpener from turning.In some cases it might be found to slip, however, and to obviate this Iprovide the sharpener with a pin, a, which is fixed into the tang of thesharpener, and is adapted to pass into the slot p in the chamber of thehandleshaft,as indicated in dotted lines in Fig. l. The slot 0 beingcurved, as shown, prevents the sharpener not only from turning, but alsofrom moving longitudinally outward.

I claim- 1. A pencil-sharpener consisting of a case, A, having an innerconical bore, a cuttingknife secured therein, an exit-passage for thechips or shavings, a stop, 6, arranged at the rear of the conical bore,and an exit-opening leading from said conical bore, substantially asdescribed.

2. A pencil-sharpener consisting of a case, A, having an inner conicalbore, a cuttingknife secured therein, an exit-passage for the chips orshavings, a stop, 6, arranged at the rear of the conical bore, averticalexit-opening for the lead filings, and an inclined passage, f,snbstantiall y as and for the purpose described. 3. In apencil-sharpener of substantially 5 the construction described, the caseA,having the described longitudinal bore to receive the pencil end,anexit hand an inclined passage, f, the rear end of said sharpener being;formed into a conical tang and provided with pin n, in combination withasuitable handle, 0, hav- 10 ing slot 12 to receive the pin n, and achamber to receive the tang of the sharpener. r

i \V. H. LAMSON.

Witnesses:

G. B. TUTTLE, C. O. TUTTLE.

